Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.1 027/267] staging: rtl8712: prevent buffer overrun in recvbuf2recvframe | Date | Fri, 31 Jul 2015 12:37:58 -0700 |
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4.1-stable review patch. If anyone has any objections, please let me know.
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From: Haggai Eran <haggai.eran@gmail.com>
commit cab462140f8a183e3cca0b51c8b59ef715cb6148 upstream.
With an RTL8191SU USB adaptor, sometimes the hints for a fragmented packet are set, but the packet length is too large. Allocate enough space to prevent memory corruption and a resulting kernel panic [1].
[1] http://www.spinics.net/lists/linux-wireless/msg136546.html
Signed-off-by: Haggai Eran <haggai.eran@gmail.com> ACKed-by: Larry Finger <Larry.Finger@lwfinger.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/staging/rtl8712/rtl8712_recv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/staging/rtl8712/rtl8712_recv.c +++ b/drivers/staging/rtl8712/rtl8712_recv.c @@ -1056,7 +1056,8 @@ static int recvbuf2recvframe(struct _ada /* for first fragment packet, driver need allocate 1536 + * drvinfo_sz + RXDESC_SIZE to defrag packet. */ if ((mf == 1) && (frag == 0)) - alloc_sz = 1658;/*1658+6=1664, 1664 is 128 alignment.*/ + /*1658+6=1664, 1664 is 128 alignment.*/ + alloc_sz = max_t(u16, tmp_len, 1658); else alloc_sz = tmp_len; /* 2 is for IP header 4 bytes alignment in QoS packet case.
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